Elshafei, A. (1969). Process Control Series Equipment Specifications. The Institute of National Planning.
Tohutoru Kātū Chicago (17th ed.)Elshafei, Alwalid. Process Control Series Equipment Specifications. Cairo: The Institute of National Planning, 1969.
Tohutoro MLA (9th ed.)Elshafei, Alwalid. Process Control Series Equipment Specifications. The Institute of National Planning, 1969.
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